Troubleshooting
3A1183C
19
Troubleshooting
General
Problem
Cause
Solution
Unit doesn’t prime
Airleak due to loose suction nut
Tighten suction nut.
Airleak due to worn o-rings
Replace o-ring on suction seat and o-ring
below suction seat.
Stuck or fouled balls
Service inlet and outlet valves.
Prime/Pressure Relief valve not
opening
Clean or replace Prime/Pressure Relief Valve
Unit primes but has poor or no
pressure
Pressure set too low
Turn up pressure.
Filter(s) are clogged
Clean or replace gun filter, inlet filter, and/or
manifold filter.
Outlet valve fouled/worn.
Service outlet valve.
Prime/pressure relief valve
bypassing
Clean or replace Prime/Pressure Relief Valve
Packings and/or piston worn
Tighten packing nut, repack unit.
Unit does not maintain good
spraying pressure
Blown spray tip
Replace spray tip.
Packings and/or pistons worn
Repack unit.
Upper seat worn
Replace upper seat.
Unit does not run
See
Machine Does Not Start
Machine does not start
Control Settings
Make sure machine is plugged into the wall.
Verify the on-off switch is in the ON position
and the pressure control knob is turned all the
way to the right (clockwise for maximum pres-
sure).
Pressure Control Assembly
(Board)
If the power indicating light is still out after
checking the control settings and power
source, replace the pressure control assem-
bly.
